The techniques for painting the interior and exterior of your home are the same. For the exteriors, you just need a pressure washer to clean the walls before you begin. Make sure that you have purchased all the materials mentioned here, and only then undertake this job.
Step #1: Cleaning the Walls
All the dirt and grime should be cleaned from the wall surface. Otherwise, the paint or primer will not bond well with the walls. This is a tough job as these walls are often neglected and thick layers of dust and debris form on them.
If you are painting walls in your home's interior, remove all the wall decorations before you start. Cover up wall fixtures and trims with the help of a painter's tape. Scrape out loose, peeling paint with the help of a putty knife.
After you're done, scrub the remaining dirt and dust with the brush dipped in a bucket of soapy solution. Use a pressure washer to wash off the exterior walls.
Step #2: Repairing
Any cracks or holes in the walls should be repaired. This is important because even a minor defect on the wall becomes prominent after application of paint. Use a cement patching compound to seal up the crevices.
Walls in the basement often have the problem of seepage of ground water; this kind of damage should be repaired first. Let the wall dry up completely before you move on to the next step.
A paint roller is suitable for applying primer on the broad surfaces, while a paintbrush should be used for the trims. Leave the walls untouched until the coat of primer dries up completely. Approximately, it takes two hours for this coat to dry. However, read the manufacturer's notice on the primer carton to confirm.
Pour some paint on a paint tray, dip the paint roller into it, and apply the paint evenly on the wall. You have to apply at least 2-3 coats. Every coat should be given enough time to dry up before the next one is applied.
On a plain cement wall, you can use any random strokes with the paint roller. However, while painting cement block walls, use a back-and-forth motion with the roller so that the paint distribution is uniform.
Wear protective gear like gloves and a respirator to protect yourself from dust. Make sure that your indoor work area has enough ventilation, giving you comfort while working.